[PATCH 2/2] iio: imu: adis16480: Add the option to enable/disable burst mode

[Alexandru Ardelean]

From: Stefan Popa <stefan.p...@analog.com>

Although the burst read function does not require a stall time between
each 16-bit segment, it however requires more processing since the
software needs to look for the BURST_ID and take into account the offset
to the first data channel. Some users might find it useful to be able to
switch between the two modes.

Signed-off-by: Stefan Popa <stefan.p...@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardel...@analog.com>
---
 drivers/iio/imu/adis16480.c | 48 +++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
index 9b100c8fb744..7d7712c33435 100644
--- a/drivers/iio/imu/adis16480.c
+++ b/drivers/iio/imu/adis16480.c
@@ -330,6 +330,45 @@ static int adis16480_debugfs_init(struct iio_dev 
*indio_dev)
 
 #endif
 
+static ssize_t adis16495_burst_mode_enable_get(struct device *dev,
+                                              struct device_attribute *attr,
+                                              char *buf)
+{
+       struct adis16480 *st = iio_priv(dev_to_iio_dev(dev));
+
+       return sprintf(buf, "%d\n", st->adis.burst->en);
+}
+
+static ssize_t adis16495_burst_mode_enable_set(struct device *dev,
+                                              struct device_attribute *attr,
+                                              const char *buf, size_t len)
+{
+       struct adis16480 *st = iio_priv(dev_to_iio_dev(dev));
+       bool val;
+       int ret;
+
+       ret = kstrtobool(buf, &val);
+       if (ret)
+               return ret;
+
+       st->adis.burst->en = val;
+
+       return len;
+}
+
+static IIO_DEVICE_ATTR(burst_mode_enable, 0644,
+                      adis16495_burst_mode_enable_get,
+                      adis16495_burst_mode_enable_set, 0);
+
+static struct attribute *adis16495_attributes[] = {
+       &iio_dev_attr_burst_mode_enable.dev_attr.attr,
+       NULL,
+};
+
+static const struct attribute_group adis16495_attribute_group = {
+       .attrs = adis16495_attributes,
+};
+
 static int adis16480_set_freq(struct iio_dev *indio_dev, int val, int val2)
 {
        struct adis16480 *st = iio_priv(indio_dev);
@@ -1131,6 +1170,14 @@ static const struct iio_info adis16480_info = {
        .debugfs_reg_access = adis_debugfs_reg_access,
 };
 
+static const struct iio_info adis16495_info = {
+       .attrs = &adis16495_attribute_group,
+       .read_raw = &adis16480_read_raw,
+       .write_raw = &adis16480_write_raw,
+       .update_scan_mode = adis_update_scan_mode,
+       .debugfs_reg_access = adis_debugfs_reg_access,
+};
+
 static int adis16480_stop_device(struct iio_dev *indio_dev)
 {
        struct adis16480 *st = iio_priv(indio_dev);
@@ -1365,6 +1412,7 @@ static int adis16480_probe(struct spi_device *spi)
        if (st->chip_info->burst) {
                st->adis.burst = st->chip_info->burst;
                st->adis.burst_extra_len = st->chip_info->burst->extra_len;
+               indio_dev->info = &adis16495_info;
        }
 
        ret = adis_setup_buffer_and_trigger(&st->adis, indio_dev,
-- 
2.17.1